User Manual

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Siemens HVAC central apartment unit with consumption data acquisition QAX903 CE1N2741en
Building Technologies 2016-01-30
Use
• Heating and cooling control management for an apartment.
• Radiator/floor cooling monitored for dew point.
• Increase the Economy room setpoint and minimum flow temperature setpoint
dependent on composite outside air temperature.
• Collect heating/refrigeration requests from individual rooms.
• Generate heating or refrigeration request signals and transmit them to heating
and refrigeration generation via wired bus, via heat/refrigeration demand relay,
or via DC 0…10 V output to the RRV912 or RRV934.
• Suited for heating and cooling plants with central distribution (e.g. floor heating)
and radiators with decentralized connections.
• Limit the heating setpoint (max.) and cooling setpoint (min.).
• Control heating circuits with RRV912/RRV918 heating controllers and SSA955
radiator control actuators.
• Control the flow temperature of 2 independent room groups with limitation func-
tion (min/max) and maintain return temperature high/low.
• Control the room groups’ pumps via universal relay outputs.
• Manage a ventilation plant via multi-controller RRV934.
• Night cooling function (heat recovery bypass function).
• Air conditioning unit control (split units) via universal outputs (local and RRV91x)
or via S-mode (KNX TP).
• Release cooling enable contacts for each room dependent on the composite
outside temperature, present HVAC level, window status, and heating demand.
• Display outside temperature curve and outside air pressure over the last 24 hours
using the QAC910 meteo sensor.
• Indicate open windows.
• Display weather trends (sunny, varying, bad).
• Record consumption data for heat, water, electricity, and gas using the
consumption data interface WRI982.
• Remote access via Siemens OZW77x central communication units.
• Remote control of the Synco living system via Smartphone app or web portal.
Equipment combinations
The unit can be used together with the following wireless products of the Siemens
Synco living system and those of other suppliers of KNX RF products:
Device designation
Type
Documentation *)
Room unit
QAW910
N2703en
Room temperature sensor
QAA910
N270en
Meteo sensor
QAC910
N2702en
Heating circuit controller
RRV912
N2705en
Heating circuit controller
RRV918
N2706en
Multi-controller
RRV934
N2709en
Radiator control actuator
SSA955
N2700en
Radio repeater
ERF910
N2704en
Consumption data interface
WRI982
N2735en
Web server
OZW772.xx
N5701en
Door and window contacts
AP 260/11
GAMMA